, the letter addressed to president obama is very stloor thimilar t sent to senator wicker. we don't know exactly what that is, if it's the envelope, the handwriting, the message inside, it's interesting what dana did say that bears commenting on. in the wake of 9/11, where it was weeks later, and there were the anthrax, this is a little different because you see the attack on monday, and we don't know if there is a connection here, but the letters being received on tuesday. the letter addressed to president obama received. so obviously very close in time, and because of that, because of that proximity in time, it certainly raises the question of whether these might be connected, although we certainly don't know at this point, carol. >>> brianna and dana, we'll come back to you. a letter addressed to president obama laced with an unknown substance was stopped at an off site facility. as you know senator quicker of mississippi received a letter yesterday that supposedly, maybe, investigators say may be laced with ricin. we'll have more on that and more. and also new developments in boston.